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SE9603332L - Method and apparatus for generating comfort noise in linear predictive speech decoders - Google Patents

Method and apparatus for generating comfort noise in linear predictive speech decoders

Info

Publication number
SE9603332L
SE9603332L SE9603332A SE9603332A SE9603332L SE 9603332 L SE9603332 L SE 9603332L SE 9603332 A SE9603332 A SE 9603332A SE 9603332 A SE9603332 A SE 9603332A SE 9603332 L SE9603332 L SE 9603332L
Authority
SE
Sweden
Prior art keywords
frames
background noise
speech
received
describing
Prior art date
Application number
SE9603332A
Other languages
Swedish (sv)
Other versions
SE507370C2 (en
SE9603332D0 (en
Inventor
Ingemar Johansson
Original Assignee
Ericsson Telefon Ab L M
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Priority to SE9603332A priority Critical patent/SE507370C2/en
Publication of SE9603332D0 publication Critical patent/SE9603332D0/en
Priority to PCT/SE1997/001491 priority patent/WO1998011536A1/en
Priority to AU41423/97A priority patent/AU4142397A/en
Priority to JP51355198A priority patent/JP2001506764A/en
Priority to US08/928,523 priority patent/US5978761A/en
Publication of SE9603332L publication Critical patent/SE9603332L/en
Publication of SE507370C2 publication Critical patent/SE507370C2/en

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/012—Comfort noise or silence coding

Landscapes

  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Noise Elimination (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

Comfort noise is produced in a linear predictive speech decoder which operates discontinuously, i.e., treats data frames which alternately represent speech information and background noise. During decoding of received data frames which contain background noise-describing parameters, a first number of these data frames which have been received directly before a speech frame are excluded and replaced with one or more background noise describing frames which have been received earlier. Another number of the background noise-describing frames which have been received immediately after a sequence of speech frames are also left out during the decoding and replaced by one or more background noise-describing frames which have been received before the sequence of speech frames. This results in a minimized degradation of the background noise information and gives an optimal comfort noise on the receiver side.
SE9603332A 1996-09-13 1996-09-13 Method and apparatus for generating comfort noise in linear predictive speech decoders SE507370C2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
SE9603332A SE507370C2 (en) 1996-09-13 1996-09-13 Method and apparatus for generating comfort noise in linear predictive speech decoders
PCT/SE1997/001491 WO1998011536A1 (en) 1996-09-13 1997-09-05 Method and arrangement in a telecommunication system
AU41423/97A AU4142397A (en) 1996-09-13 1997-09-05 Method and arrangement in a telecommunication system
JP51355198A JP2001506764A (en) 1996-09-13 1997-09-05 Methods and arrangements in telecommunications systems
US08/928,523 US5978761A (en) 1996-09-13 1997-09-12 Method and arrangement for producing comfort noise in a linear predictive speech decoder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9603332A SE507370C2 (en) 1996-09-13 1996-09-13 Method and apparatus for generating comfort noise in linear predictive speech decoders

Publications (3)

Publication Number Publication Date
SE9603332D0 SE9603332D0 (en) 1996-09-13
SE9603332L true SE9603332L (en) 1998-03-14
SE507370C2 SE507370C2 (en) 1998-05-18

Family

ID=20403869

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9603332A SE507370C2 (en) 1996-09-13 1996-09-13 Method and apparatus for generating comfort noise in linear predictive speech decoders

Country Status (5)

Country Link
US (1) US5978761A (en)
JP (1) JP2001506764A (en)
AU (1) AU4142397A (en)
SE (1) SE507370C2 (en)
WO (1) WO1998011536A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6240383B1 (en) * 1997-07-25 2001-05-29 Nec Corporation Celp speech coding and decoding system for creating comfort noise dependent on the spectral envelope of the speech signal
US7072832B1 (en) 1998-08-24 2006-07-04 Mindspeed Technologies, Inc. System for speech encoding having an adaptive encoding arrangement
US6256606B1 (en) * 1998-11-30 2001-07-03 Conexant Systems, Inc. Silence description coding for multi-rate speech codecs
KR100317810B1 (en) * 1998-12-31 2001-12-22 서평원 Reframer and loss of frame check apparatus for digital hierarchy signal
JP3451998B2 (en) * 1999-05-31 2003-09-29 日本電気株式会社 Speech encoding / decoding device including non-speech encoding, decoding method, and recording medium recording program
JP3670217B2 (en) * 2000-09-06 2005-07-13 国立大学法人名古屋大学 Noise encoding device, noise decoding device, noise encoding method, and noise decoding method
US20030120484A1 (en) * 2001-06-12 2003-06-26 David Wong Method and system for generating colored comfort noise in the absence of silence insertion description packets
GB0129369D0 (en) * 2001-12-07 2002-01-30 Filtrona United Kingdom Ltd Method and apparatus for marking articles
US7746797B2 (en) * 2002-10-09 2010-06-29 Nortel Networks Limited Non-intrusive monitoring of quality levels for voice communications over a packet-based network
US9495971B2 (en) 2007-08-27 2016-11-15 Telefonaktiebolaget Lm Ericsson (Publ) Transient detector and method for supporting encoding of an audio signal
CN100555414C (en) * 2007-11-02 2009-10-28 华为技术有限公司 A kind of DTX decision method and device
TR201909562T4 (en) * 2013-02-22 2019-07-22 Ericsson Telefon Ab L M Methods and devices for DTX residue in audio coding.

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5537509A (en) * 1990-12-06 1996-07-16 Hughes Electronics Comfort noise generation for digital communication systems
GB2256351B (en) * 1991-05-25 1995-07-05 Motorola Inc Enhancement of echo return loss
JP2518765B2 (en) * 1991-05-31 1996-07-31 国際電気株式会社 Speech coding communication system and device thereof
JP3432822B2 (en) * 1991-06-11 2003-08-04 クゥアルコム・インコーポレイテッド Variable speed vocoder
JP3167385B2 (en) * 1991-10-28 2001-05-21 日本電信電話株式会社 Audio signal transmission method
JPH07129195A (en) * 1993-11-05 1995-05-19 Nec Corp Sound decoding device
CN1129486A (en) * 1993-11-30 1996-08-21 美国电报电话公司 Transmitted noise reduction in communications systems
JP3182032B2 (en) * 1993-12-10 2001-07-03 株式会社日立国際電気 Voice coded communication system and apparatus therefor
US5657422A (en) * 1994-01-28 1997-08-12 Lucent Technologies Inc. Voice activity detection driven noise remediator
FI100932B (en) * 1995-04-12 1998-03-13 Nokia Telecommunications Oy Transmission of audio frequency signals in a radiotelephone system
FI105001B (en) * 1995-06-30 2000-05-15 Nokia Mobile Phones Ltd Method for Determining Wait Time in Speech Decoder in Continuous Transmission and Speech Decoder and Transceiver
FR2739995B1 (en) * 1995-10-13 1997-12-12 Massaloux Dominique METHOD AND DEVICE FOR CREATING COMFORT NOISE IN A DIGITAL SPEECH TRANSMISSION SYSTEM
US5689615A (en) * 1996-01-22 1997-11-18 Rockwell International Corporation Usage of voice activity detection for efficient coding of speech
US5794199A (en) * 1996-01-29 1998-08-11 Texas Instruments Incorporated Method and system for improved discontinuous speech transmission
US5881373A (en) * 1996-08-28 1999-03-09 Telefonaktiebolaget Lm Ericsson Muting a microphone in radiocommunication systems

Also Published As

Publication number Publication date
JP2001506764A (en) 2001-05-22
WO1998011536A1 (en) 1998-03-19
AU4142397A (en) 1998-04-02
SE507370C2 (en) 1998-05-18
SE9603332D0 (en) 1996-09-13
US5978761A (en) 1999-11-02

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